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| US4609974 | 11 jun 1985 | 2 sep 1986 | | Light radiator |
| US4643877 | 8 aug 1984 | 17 feb 1987 | Max Planck Gesellschaft zur Foerderung der Wissenschaften | Fluorometer |
| US4730922 | 8 maj 1985 | 15 mar 1988 | E. I. Du Pont de Nemours and Company | Absorbance, turbidimetric, fluorescence and nephelometric photometer |
| US4867559 | 6 jan 1988 | 19 sep 1989 | Amoco Corporation | Liquid/liquid fiber-optic fluorescence detector and absorbance analyzer |
